parent board name not visible

I have 3 parent boards. Those parent board all have 2 child boards each.

Those child boards are named the same. Only difference is the parant. However the parent board is not visible anymore, when reading a topic...

I attached 2 screenshots. screenshot 1 is of the overal view of the forum...
screenshot 2 is of a topic inside of a board.....

I think pics say more then words ;-)